I have a vinyl LP from the UK entitled Martha Reeves and the Vandellas Greatest Hits Volume 2. I had never even seen it until I bought it on ebay a few years ago. It roughly covers the period from 1966 until their Motown career ended in 1972. Lois and Sandra are the Vandellas pictured. Also I have a number of magazines with large Motown feature articles that I might put on ebay myself one of these days.